Larger tyres for prado

[xvprado Senior Member Find all posts View Profile Close xvprado]

Interesting comment Boof

I have mucked around with this a bit

With my Prado, the insurance policy is now endorsed that they are aware and agree that the vehicle is shod at 265/70/17 and that they accept this as a condition of offering insurance on said vehicle

I wont even bother on commenting on Toyota's attitude to this, god bless their little cotton socks

The other one has been far more interesting, my son has a Ford Courier TD 4wd ute. The standard tyre is 265/70/15 @112S

This is a ridiculously high load rating of some 1030kg per tyre, and he can only buy road biased tyres that conform, the most aggressive tyre he could find was a Cooper ATR and whilst good, he was looking for a bit more

He wanted to put a more aggressive tyre on it and settled on some FCII's (mickey thompson) 31/10.5/15 LTs at 109Q

The GVM of the vehicle is 2871kg and the axle load rating is a combined figure of 3300kg, but the specified tyres provided a load rating of in excess of 4000kg...go figure that

The insurance co has agreed to him running the 31's at 109Q and are sending a letter to endorse the policy at this load/spped rating and accepting it as a condition of the insurance, so problem solved

They have been offered an engineers certificate but dont require it, so the moral to the story is, get your facts right and demonstrate your case clearly and things should be all good.

The insurer by the way is Allianz and i have found them pretty good to deal with so far, but I havent made any claims so my exposure is a bit limited

[StormyKnight Advanced Member Find all posts View Profile Close StormyKnight]

I've edited my post above re engineering certificate pricing - I also had to get a blue slip done since once the tyres where put on, the car was effectively unregistered. Anyway its the blue slip that the RTA use to recreate the rego sticker....

Its time I think we went to the new ADR's....

[StormyKnight Advanced Member Find all posts View Profile Close StormyKnight]

The insurance co has agreed to him running the 31's at 109Q and are sending a letter to endorse the policy at this load/spped rating and accepting it as a condition of the insurance, so problem solved

But if the guy who does the next pink slip does it by the book - he will get knocked back - unlikely to actualy happen, but a possibility.

Its the RTA that definds the rules for registration. Just because an insurer will insure it, doesn't mean that the RTA will register it.

As i have said before....I'm hoping the new ADR's come in soon, as the 15mm limitation on all cars is stuff all on a 4WD. After all, my BFG MT's have 15mm of tread when they were new which means they effectively vary by nearly 30mm diameter between new & worn out! Its crazy!

[Fazza Senior Member Find all posts View Profile Close Fazza]

Interesting comment Boof


The other one has been far more interesting, my son has a Ford Courier TD 4wd ute. The standard tyre is 265/70/15 @112S

He wanted to put a more aggressive tyre on it and settled on some FCII's (mickey thompson) 31/10.5/15 LTs at 109Q

The insurance co has agreed to him running the 31's at 109Q and are sending a letter to endorse the policy at this load/spped rating and accepting it as a condition of the insurance, so problem solved

They have been offered an engineers certificate but dont require it, so the moral to the story is, get your facts right and demonstrate your case clearly and things should be all good.

The insurer by the way is Allianz and i have found them pretty good to deal with so far, but I havent made any claims so my exposure is a bit limited

As StormyKnight stated, Its the RTA that make the rules not the Insurance companies.

All dangerous ground as the load rating MUST NOT BE LOWER than the manufactures recommendations as on the placecard.

When I was in the tyre game I could also be liable for fitting the wrong tyres.

Fazza

[boof Member Find all posts View Profile Close boof]

I should have added my comment came from an insurance assessor that has worked for a few major companies :wink:

I have put 265/70/17s on the wifes Prado but I made that choice and will cop the consequences should it come to that. The hilux runs 315/70/17s and so far no dramas 8)

[Fazza Senior Member Find all posts View Profile Close Fazza]

boof,
Insurance assessor's don't write the rules & in a past life where did they come from (Generally ex panel beaters)

It all depends on how in tune or astute they are?

If there are road death's that's when the CORONER becomes involved.(Different ball game) Do we all want to end up in court!

Tread carefully,
Fazza

[boof Member Find all posts View Profile Close boof]

boof,
Insurance assessor's don't write the rules & in a past life where did they come from (Generally ex panel beaters)

It all depends on how in tune or astute they are?

If there are road death's that's when the CORONER becomes involved.(Different ball game) Do we all want to end up in court!

Tread carefully,
Fazza

Mate to be completely honest they would be pushing #### up hill to prove an extra 13mm above the specified limit in tyre size caused the fatality. As I said I am not concerned and to be honest think its a crock and people worry too much. Its legal in other states without dramas and as said before every second 4b on the road has an increase greater than 15mm.

As for the Hilux it has upgraded brakes among other things, but I would be interested to hear in court why I can go from a 100Kw motor to a 230kw motor for a $70 mod plate, and no regard for brakes or suspension upgrades. But increasing a tyre size suddenly makes the vehicle a death machine :roll:

[Fazza Senior Member Find all posts View Profile Close Fazza]

As for the Hilux it has upgraded brakes among other things, but I would be interested to hear in court why I can go from a 100Kw motor to a 230kw motor for a $70 mod plate, and no regard for brakes or suspension upgrades. But increasing a tyre size suddenly makes the vehicle a death machine :roll:

"Maybe I'm reading this all wrong but that would only make matters worse"

With no engineering certificate :shock:

Cheers,
Fazza

[boof Member Find all posts View Profile Close boof]

As for the Hilux it has upgraded brakes among other things, but I would be interested to hear in court why I can go from a 100Kw motor to a 230kw motor for a $70 mod plate, and no regard for brakes or suspension upgrades. But increasing a tyre size suddenly makes the vehicle a death machine :roll:

"Maybe I'm reading this all wrong but that would only make matters worse"

With no engineering certificate :shock:

Cheers,
Fazza

Because in Qld engine conversions are easy, that is my point. My engine is 100% legal there is no engineering in Qld just a $70 mod plate. However as they use the ADRs for tyre size you cannot increase tyres by more than 15mm. Tell me what you think is more dangerous?? I see your point and as I said in other posts to each their own. But for me increasing a tyre by one size is negliable and not worth worrying about. Others may not agree and thats fine at the end of the day its up to the individual what you want to do.


Oh and in Qld there is no way at this point in time to engineer larger tyres if their was I would happily pay it :wink:

[Fazza Senior Member Find all posts View Profile Close Fazza]

boof,

Maybe at present you are lucky in Queensland re compliance, but I would be surprised if they weren't using similar state rulings as bitdist put forward in a earlier posting re-State Rulings. (It is a bit of reading but has been in force for some time)

In Victoria you can't even change to a different carburettor with out infringing on pollution laws. Unless you have a emission test at a some absorbent cost.
Just about any mods are Taboo, e.g. grinding brake calipers to make wheels fit, copper brake lines, larger engine transplants, even different offset wheels is a worry. The list goes on, but basically any mod engineers cert.

It all becomes interesting when traveling from state to state?

Regarding tyres I was alluding to load rating laws (May not have made myself clear)

Not meaning to upset,
Cheers,
Fazza

[boof Member Find all posts View Profile Close boof]

boof,

Maybe at present you are lucky in Queensland re compliance, but I would be surprised if they weren't using similar state rulings as bitdist put forward in a earlier posting re-State Rulings. (It is a bit of reading but has been in force for some time)

In Victoria you can't even change to a different carburettor with out infringing on pollution laws. Unless you have a emission test at a some absorbent cost.
Just about any mods are Taboo, e.g. grinding brake calipers to make wheels fit, copper brake lines, larger engine transplants, even different offset wheels is a worry. The list goes on, but basically any mod engineers cert.

It all becomes interesting when traveling from state to state?

Regarding tyres I was alluding to load rating laws (May not have made myself clear)

Not meaning to upset,
Cheers,
Fazza

Not upset mate its all good. In relation to some of your comments as I believe there is so much that people dont understand its confusing for all. The tyres on the Lux and on the Prado are legal speed and load rating wise the 17" alloys on the Lux are a higher rating than standard. Thats one of the good things about American made wheels and tyres they are really well rated.

In relation to the engine conversion. The Lexus V8 is a 4.0L by law in Qld and most other states you can go to 5.0 in a Lux some states are 4.7L max. If I was to move interstate I would need an engineers to register it and I could get it legal as is in every state in Australia. Admittedly WA and SA would be a little harder than others. I have been looking into the new national code proposed for over a year. If it comes in it actually allows me more room to mod than current laws. I can even legally supercharge or twin turbo my Lexus for 400+kw and keep it 100% legal with very few changes, in fact the small changes already made to the brakes would keep it legal.

The problem is that the states are all too busy having who has the biggest #### contest so like most things it is taking an age to come in and wont be identical in every state even when it does. The guys I have spoken to who make ICVs are waiting anxiously for it to come in.

I guess my point is that as I have said if you make the changes do your research and know where you stand. Dont believe everything you read on an internet forum. Most people have fitted larger tyres as the advice of their tyre dealer never having been on the internet they are not even aware its illegal. How many 4wds are for sale in yards with RWC, pink slips what ever your state calls them with oversized tyres the answer is 100s. Ignorance is not a defence but imagine a person being found at fault due to 31" tyres on a 4wd work ute.

[Chippy Addicted PP Member Find all posts View Profile Close Chippy]

How many 4wds are for sale in yards with RWC, pink slips what ever your state calls them with oversized tyres the answer is 100s.

Excellent point Boof. I bought my Prado 2nd hand, from a Toyota dealer .. with some new car warranty left, another 3 yrs of Extra care, and 265/70/17's

I'm not even sure of the WA laws .. as to how much of an increase they allow .. but its such an easy trap to fall into. In Qld my Prado would be illegal .. and, as the buyer, I would have to wear the cost of bringing it back into code.

Cheers
Chippy

[Fazza Senior Member Find all posts View Profile Close Fazza]

Boof,

I guess we are talking the same thing! (31x10.5 x15 wrong load rating)
Your last post was well put.
One day well may see all states agree :roll:
We won't go down the path of what can you legally tow, re tow vehicle, brakes etc?
(just another can of worms re- State to State)

Cheers,
Fazza

[bitdist Senior Member Find all posts View Profile Close bitdist]

No I don't know yet. Each state will have its own timeframe about when they will work to the new standards. I'll see what I can find out though.
I would be fairly confident down here in Vic about putting on larger tyres as I know the engineers here are already working to the new standards.
They don't seem to worry as much down here anyway. A whole lot of us ran 4+ inch greater diameter tyres down here for years with no problems at all including roadworthys etc
I will see if I can get a friend who is going through engineering at the moment to ask his engineering person whether they are in now or when exactly they will be

[bitdist Senior Member Find all posts View Profile Close bitdist]

A couple of things I have gleaned on the new standards

RTA (NSW) are supposed to be ratifying it as of February when the new engineering signatories standards/process comes into force

But if you read the preface to the new standards they say there

The NCOP has been subsequently endorsed by all Australian State and Territory Authorities responsible for vehicle standards and the registration of vehicles for road use.